Hi Kelly:
Are you sure about the XHHW listing. Doesn't that designate aluminum wire?
You mentioned CU before.
I have seen some discolloration from copper wire against module frames, but
not real corrosion.
Nick Soleil
Project Manager
Advanced Alternative Energy Solutions, LLC
P
Kindly bear with me as I go "back to basics". #10 cu has been my old standby
for bonding the metal solar module frames but in recent years Arthur Ruden @
Sharp told me to use nothing smaller than #8. I don't know if other major PV
mfr's have a similar spec or not but before I buy a spool...
The ne
Scott,
300.3(2) allows grounding and bonding conductors to be outside of a
raceway. See 250.134(B), exception 2.
Kelly Keilwitz, P.E.
Principal
Whidbey Sun & Wind
Renewable Energy Systems
NABCEP Certified PV Installer
WA Electrical Administrator
987 Wanamaker Rd.
Coupeville, WA 98239
ke...@whi
300.3(A) prohibits the use of XHHW outside of a recognized wiring method, which
means you need a conduit or raceway. You can use USE-2 in an exposed outdoor
location only because 690.31(B) allows it, but only for module interconnections.
Scott
On Jan 14, 2011, at 11:45 AM, Kelly Keilwitz, Whidb
Peter,
Yes the #10 XHHW (2) we use is green-jacketed, and 90˚ rated. We get
it through our local electrical supply house.
Kelly Keilwitz, P.E.
Whidbey Sun & Wind
Renewable Energy Systems
ke...@whidbeysunwind.com
360-678-7131
On Jan 14, 2011, at 11:04 AM, Peter Parrish wrote:
Great idea Ke
Peter,i've been having the same concern running thru my head recently, as i've
done this myself, and have compensated by now using a green jacketed bond
(ground) wire for rail and module bonding. (fyi-bonding is the CEC term for
inter-connecting all metallic parts of an electrical system, i.e.
HI Peter,
I"m wondering that since the insulation isn't needed at all, wouldn't that
negate the need for -2?
thanks,
jay
peltz power
On Jan 14, 2011, at 11:04 AM, Peter Parrish wrote:
> Great idea Kelly! I didn't know one could get green jacketed USE or XHHW. Do
> you have a source? Also, do
Great idea Kelly! I didn't know one could get green jacketed USE or XHHW. Do
you have a source? Also, do you think that we might need wire rated "-2" for
90 deg C wet locations. I know that this is not a current carrying
conductor, but roof tops are definitely 90 deg C wet environments. Your
though
Peter:
In my experience and understanding of the relative electro-negativity or
electrode potential of these two metals, there is not an issue for the copper
to erode to the point of ground failure - the aluminum goes first. In a
marine environment, especially salt water areas, all metals
August,
If the SI does, indeed, shut out the pass-through AC channel when the
critical load panel is connected directly to the grid this is
certainly a simpler solution. That would explain why the GD inverters
would drop out during a switch.
Is the switch-over is fast enough that time-keepin
Peter,
I have never understood the common practice of using bare copper
ground wire on and against aluminum frames and modules. It always has
been a dissimilar metals issue. Just look anywhere copper has set
against aluminum for awhile.
We use #10 green jacketed Cu USE or XHHW conductor and
Hi Kelly -
Yes, AC1 from the Sunny Island is always connected to the critical loads
panel. During on-grid operation the critical loads panel is fed solely
through the main panel and transfer switch, not through the Sunny Island.
I see your question about paralleling the critical loads panel throug
One of my students who is currently responsible for standing for inspection
at their company encountered a inspector who made an interesting point about
incompatible metals (i.e. copper and anodized aluminum).
The PV system in question used outdoor rated lay-in lugs to bond the rails
to bare coppe
Hello, Jeremy or Amy~
The T240 auto-transformer did not ever come factory-installed on a Trace
Power Panel. The T240 was always just a part, but some technicians have
field installed those onto the blank space on a "single inverter" Power
Panel. T240 does incorporate some Square-D breakers and I b
Hi August,
To make sure I'm clear:
Does the Sunny Island output (AC1) stay connected to the critical load
panel while at the same time fed directly from the main panel?
If so, is there no issue with the critical loads being fed through
multiple paths? And, why, then, would the GD inverters s
Wrenches,
I am trying to locate part numbers for the square D breakers and interlock used
for one of the old power panels from Xantrex with a T240 enclosure ( I
believe), used as the inverter output / bypass. I also seem to remember there
is a mounting issue with the breakers also as they come t
Hi Kelly -
Sounds like a fun project. We've got a few 10+ kW grid tied Sunny Island
projects and although they are not with Enphase inverters I thought I'd
pass on how we've been wiring them up with good results.
We tie the solar inverters into the critical loads panel and then put a
transfer swi
Roy, Allan, Matt and Dana..
Thanks for the info. I knew you guys would come through for me.
Best,
Chad Waits
Net Zero Solar
520.270.4873
chadwa...@netzerosolar.net
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Roy
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